81. Which polymer is commonly used in the manufacture of toys, containers, and furniture?
- a) Polystyrene
- b) Polyethylene
- c) Nylon-6,6
- d) Polypropylene
Answer: d) Polypropylene
Explanation: Polypropylene is widely used for making toys, containers, and furniture because of its toughness, flexibility, and low cost.
82. Which polymer is used to make contact lenses and dental fillings?
- a) Polyethylene
- b) Polycarbonate
- c) Poly(methyl methacrylate) (PMMA)
- d) Polystyrene
Answer: c) Poly(methyl methacrylate) (PMMA)
Explanation: PMMA is a transparent and rigid polymer, used in contact lenses, dental fillings, and transparent barriers due to its optical clarity and biocompatibility.
83. Which of the following polymers has excellent insulating properties and is used in electrical wiring?
- a) Bakelite
- b) Nylon
- c) Polyvinyl chloride
- d) Polystyrene
Answer: c) Polyvinyl chloride
Explanation: PVC is widely used as an electrical insulator in wiring due to its high insulating properties, durability, and flame resistance.
84. Which of the following is an elastomeric polymer?
- a) Polypropylene
- b) Neoprene
- c) Bakelite
- d) Nylon-6
Answer: b) Neoprene
Explanation: Neoprene is an elastomeric polymer, commonly used for making wetsuits, hoses, and gaskets because of its elasticity, weather resistance, and chemical stability.
85. Which of the following polymers is commonly used in 3D printing?
- a) Polyethylene
- b) Polylactic acid (PLA)
- c) Nylon-6
- d) Bakelite
Answer: b) Polylactic acid (PLA)
Explanation: PLA is a biodegradable polymer used in 3D printing due to its ease of use, environmental friendliness, and ability to form precise shapes.
86. Which of the following is a biodegradable polymer?
- a) Polyvinyl chloride
- b) Polystyrene
- c) Poly(lactic-co-glycolic acid) (PLGA)
- d) Polyethylene
Answer: c) Poly(lactic-co-glycolic acid) (PLGA)
Explanation: PLGA is a biodegradable polymer used in medical applications like drug delivery and tissue engineering due to its biocompatibility and ability to degrade in the body.
87. Which polymer is known for its heat-resistant and electrical insulating properties, used in electronics?
- a) Bakelite
- b) Polypropylene
- c) Teflon
- d) Nylon-6
Answer: a) Bakelite
Explanation: Bakelite is known for its excellent heat resistance and electrical insulating properties, making it ideal for use in electrical switches, sockets, and electronics.
88. Which polymer is commonly used in the food packaging industry due to its moisture barrier properties?
- a) Polystyrene
- b) Polyvinyl chloride
- c) Polyethylene
- d) Polypropylene
Answer: c) Polyethylene
Explanation: Polyethylene is used in food packaging, such as plastic wraps and containers, because of its excellent moisture barrier properties and flexibility.
89. Which of the following polymers is used in making flexible tubes and pipes?
- a) Polyethylene
- b) Polystyrene
- c) Bakelite
- d) Polyurethane
Answer: d) Polyurethane
Explanation: Polyurethane is used in making flexible tubes and pipes due to its flexibility, durability, and resistance to chemicals.
90. Which of the following polymers is used to manufacture bulletproof vests and helmets?
- a) Polyethylene
- b) Polyvinyl chloride
- c) Kevlar
- d) Polystyrene
Answer: c) Kevlar
Explanation: Kevlar is a high-strength polymer used in the manufacture of bulletproof vests and helmets because of its high tensile strength and durability.
Leave a comment